Connection Impact Assessments

When faced with the challenge of connecting new embedded generation projects to their grids, utilities find that a detailed and accurate Connection Impact Assessments (CIA) is the single most important input into the connection process. CIAs can discover potential issues early on in the project process. The ultimate goal is to commit to as much embedded generation as the system allows without compromising power quality to existing load customers.

We have assisted a number of Local Distribution Companies (LDC) connect Feed-in-Tariff and other embedded generation projects to their grids. Our approach is to model your existing distribution feeders as precisely as possible, allowing for the determination of the incremental impact of additional generation to your grid much more accurately. Our CIA team will construct a feeder model from distribution maps and other associated data. Data can be imported directly from popular GIS formats such as ESRI ArcGIS and AutoDesk. We focus on all aspects of the generator’s impact on the grid including voltage profile, ampacity issues, inrush currents, effects on the short-circuit levels on the feeder, transient analysis of faults and intermittent connections and disconnections, tolerance of existing feeder protection settings, among others. Assessments are carried out to determine whether the passive anti-islanding schemes are sufficient or whether active islanding protection is recommended with the use of external relays and remote trip.

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